Malicious PDF — malware analysis report

Static analysis result for SHA-256 d047440530db13a4…

MALICIOUS

PDF

32.2 KB Created: 2018-06-11 09:19:49 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7)
MD5: 97962774e66581ed28f383c60e63ca22 SHA-1: 94d9abc14fc61f98ee6b98a651950b7f7cc24439 SHA-256: d047440530db13a468239bc12913ef526e9a704aa19d86fc42b74e08a1341c4f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document uses SEO poisoning tactics to appear as a legitimate resource for car audio wiring diagrams. It contains embedded URLs that redirect to malicious download pages, as indicated by the 'PDF_SEO_FAKE_DOWNLOAD' heuristic. The ML classifier also flagged the PDF as malicious with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit vulnerabilities or trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9202

Heuristics 4

  • Fake 'free download' SEO-poisoning PDF critical PDF_SEO_FAKE_DOWNLOAD
    The ML classifier flagged this PDF AND it carries a visual download/call-to-action lure AND an off-domain server-side download-gateway link whose query string names a document payload. This three-signal conjunction is the fake-document / 'free PDF download' SEO-poisoning delivery pattern: the page is padded with benign decoy links to dilute classifier scores while funnelling the victim through the gateway to malware/scareware. Acting only on the conjunction keeps benign download-bearing PDFs from being misflagged.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://uncpbisdegree.com/download3.php?q=wiring-diagrams-car-audio.pdf
    • http://uncpbisdegree.com/download4.php?q=wiring-diagrams-car-audio.pdf
    • http://www.modifiedlife.com/car-stereo-wiring-diagrams-and-car-radio-wiring-diagrams/
    • http://www.mobileinformationlabs.com/Wiring
    • http://www.caraudiohelp.com/wiring_diagrams_for_car_radio.html
    • http://www.mobileinformationlabs.com/pioneer-car-stereo-wiring-diagrams.htm
    • https://nationalautosound.com/subwoofer-wiring-diagrams/
    • http://www.modifiedlife.com/
    • http://www.caraudiohelp.com/car_audio_wiring.html
    • https://www.the12volt.com/caraudio/woofer_configurations.asp
    • http://www.tehnomagazin.com/Auto-radio-car-connector/TOYOTA-Car-Radio-Wiring-Connector.htm
    • http://www.tehnomagazin.com/Auto-radio-car-connector/PIONEER-Car-Radio-Wiring-Connector.htm
    • http://www.kicker.com/wiring-diagrams
    • https://www.auto-facts.org/automotive-wiring-diagrams/
    • http://tune-town.com/
    • http://www.kicker.com/car-audio-accessories
    • http://uncpbisdegree.com/1/the-acute-hand.pdf
    • http://uncpbisdegree.com/1/stealing-home-trophies-comprehension-test-answer-key.pdf
    • http://uncpbisdegree.com/1/syllabus-36-755-advanced-statistical-theory-i-fall-2011-book.pdf
    • http://uncpbisdegree.com/1/solution-manual-griffiths-quantum-mechanics-scribd.pdf
    • http://riverside-resort.net/1/volvo-penta-aq-140-wiring-diagram.pdf
    • http://uncpbisdegree.com/1/sony-security-camera-manual.pdf
    • http://riverside-resort.net/1/wooden-carport-plans-free.pdf
    • http://uncpbisdegree.com/1/the-childrens-bible.pdf
    • http://uncpbisdegree.com/1/sociological-wonderment-the-puzzles-of-social-life.pdf
    • http://riverside-resort.net/1/vw-radio-wireing-diagram.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://go.microsoft.com/fwlink/?LinkId=521839&CLCID=0409
    • http://go.microsoft.com/fwlink/?LinkID=246338&CLCID=0409
    • https://go.microsoft.com/fwlink/?linkid=868922
    • http://go.microsoft.com/fwlink/?LinkID=286759&CLCID=409
    • http://go.microsoft.com/fwlink/?LinkID=617297
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004102.bin
fbab5ada8317e4bcb64c1823c45df74e40be4e44a53e02d44e7bc5c2befee791		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4102 10892 bytes
font_01_sfnt_off00006377.bin
6213d658233cb13f868b2561661eb2f2e64561327abbaadab29cceea632ca0d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6377 7152 bytes

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